Deeply buried tunnel drilling water gushing high pressure plugging structure and construction method thereof

Abstract

The application discloses a deep-buried tunnel drilling water gushing high-pressure plugging structure and a construction method thereof. The structure comprises a water-stopping assembly, a water-guiding assembly, a grouting assembly, a plugging assembly and a lifting assembly. The drilling hole is communicated with the tunnel. The water-stopping assembly is arranged in the drilling hole. The water-guiding assembly, the grouting assembly and the plugging assembly are arranged in the tunnel and connected with the water-stopping assembly. The lifting assembly is arranged in the tunnel. The structure can plug the holes in different states, and ensure the success rate of plugging the vertical or inclined holes. Meanwhile, the water-guiding assembly is used for draining water in the drilling hole, the plugging assembly is used for stopping the water gushing in the drilling hole, and finally the grouting assembly is used for grouting and consolidating the side wall of the drilling hole. The application can quickly plug the water gushing in the drilling hole under high pressure, the plugging duration is short, the water-stopping effect is good, and the construction period is saved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of high-pressure plugging of high water inflow in tunnels, and particularly relates to a deep-buried tunnel drilling water inflow high-pressure plugging structure and a construction method thereof. BACKGROUND

[0002] In the process of hydropower station construction, due to the need for hub layout, buildings such as diversion tunnels, discharge tunnels, and traffic tunnels are often arranged. In the western region, the tunnels are deeply buried, and groundwater is developed. During the tunnel excavation process, water inflow is often encountered during drilling, and the water inflow needs to be plugged to ensure the structural safety and construction safety of the cavern. At present, the water inflow in deep-buried tunnels is often plugged by methods such as grouting around the drilling hole. The plugging time is long, and the plugging effect is general. Therefore, a device and method capable of accelerating plugging are needed.

[0003] The patent document with publication number CN119244313A discloses a ground negative pressure feeding system for deep-buried tunnel water inrush interception plugging. The hole is closed by injecting aggregate, but it is difficult to use this method to plug when the hole is inclined or vertical.

[0004] The patent document with publication number CN115163183A discloses a tunnel water inflow plugging method. A concrete cushion layer is first poured at the bottom of the tunnel, and a drainage ditch is reserved under the concrete cushion layer. Then, drainage holes are drilled around the tunnel wall, and a drainage pipe is connected to the drainage ditch. Next, grouting holes are drilled around the drainage holes and grouting material is injected. After the drainage pipe does not discharge water and the grouting material in the grouting hole appears reverse flow, the grouting hole is plugged. Then, a secondary lining sleeve pipe is embedded in the tunnel, and a grouting pipe is used to connect the side wall through hole of the secondary lining sleeve pipe and the drainage ditch. Concrete is poured between the secondary lining sleeve pipe and the tunnel wall. After the concrete reaches 75% of the design strength, grouting material is injected into the drainage ditch through the grouting pipe to plug the drainage ditch under the grouting pipe. This method needs to set multiple holes in the lining and operate separately. The present application can directly and quickly plug the tunnel water inflow, and has better effect. SUMMARY

[0005] To solve the above technical problems, the present application provides a deep-buried tunnel drilling water inflow high-pressure plugging structure and a construction method thereof.

[0006] The present application is realized by the following technical solutions.

[0007] The present application provides a deep-buried tunnel drilling water inflow high-pressure plugging structure, which includes a water stopping assembly, a water guiding assembly, a grouting assembly, a plugging assembly, and a lifting assembly. The drilling hole is connected to the tunnel. The water stopping assembly is arranged in the drilling hole. The water guiding assembly, the grouting assembly, and the plugging assembly are arranged in the tunnel and connected to the water stopping assembly. The lifting assembly is arranged in the tunnel.

[0008] Preferably, the water stop assembly comprises a water stop plug and a water stop cotton, the water stop cotton is arranged at the port of the drill hole communication tunnel, the water stop plug is connected to the water stop cotton on the side of the drill hole, a sedimentation tank is arranged at the bottom of the tunnel, and a fixed support is arranged on the tunnel.

[0009] Preferably, the plugging assembly comprises a plugging pipe, a grouting pipe and a first storage tank, the plugging pipe penetrates through the water stop assembly and extends into the drill hole, and the plugging pipe is connected to the first storage tank through the grouting pipe.

[0010] Preferably, a switch valve and a high-pressure plugging pump are arranged on the grouting pipe, and the plugging pipe is connected to the grouting pipe through a buckle with a threaded joint.

[0011] Preferably, the grouting assembly comprises a grouting pipe, a first connecting pipe, a grouting pump and a second storage tank, the grouting pipe penetrates through the water stop assembly and extends into the drill hole, the grouting pipe is connected to the grouting pump through the first connecting pipe, and the grouting pump is connected to the second storage tank.

[0012] Preferably, the grouting pipe is connected to the grouting pump through a buckle with a threaded joint, and a switch valve is arranged on the connecting pipeline of the grouting pump and the second storage tank.

[0013] Preferably, the water guide assembly comprises a water guide pipe and a second connecting pipe, the water guide pipe is connected to the second connecting pipe through a buckle with a threaded joint, the water guide pipe penetrates through the water stop assembly and extends into the drill hole, and a pressure gauge and a switch valve are arranged on the second connecting pipe.

[0014] A construction method of a deep-buried tunnel drill hole water gushing high-pressure plugging structure, comprising the following steps:

[0015] S1: Pretreatment is performed on the drill hole, and a construction personnel is lifted to the drill hole through a lifting assembly;

[0016] S2: A water stop plug is installed in the drill hole, and a water guide pipe, a grouting pipe and a plugging pipe are arranged on the water stop plug, and a water stop cotton is arranged at the outer end of the water stop plug;

[0017] S3: The high-pressure water gushing in the drill hole is first guided and drained to the sedimentation tank through the water guide pipe, after the grouting pipe, the plugging pipe and the water stop cotton are installed, the switch valve on the second connecting pipe is closed, and the water guide drainage is stopped;

[0018] S4: A high-pressure plugging pump is started, and water-reactive quick-setting material is injected into the drill hole to perform plugging;

[0019] S5: Cement mortar is injected through the grouting pipe to perform consolidation grouting on the drill hole;

[0020] S6: When the reading of the pressure gauge is reduced to 0, the plugging of the tunnel drill hole seepage is completed.

[0021] Preferably, the water quick-setting material is a quick-setting water breaking glass, and the highest position of the plugging pipe in the borehole is higher than the underground water level.

[0022] The present application has the advantages of:

[0023] The structure of the present application can plug holes in different states, ensuring the success rate of plugging vertical or inclined holes. At the same time, the water in the borehole is drained by the water guide assembly, and then the water inrush in the borehole is stopped by the plugging assembly, and finally the borehole sidewall is grouted and consolidated by the grouting assembly. The present application can quickly plug the water inrush in the borehole under high pressure, has a short plugging duration, good water stopping effect, and saves construction period. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of the present application;

[0025] Figure 2 is a structural schematic diagram of the steel flower pipe of the present application;

[0026] In the figure: 1-borehole, 2-plugging pipe, 3-grouting pipe, 4-water guide pipe, 5-water stop plug, 6-water stop cotton, 7-buckle belt wire joint, 8-grouting pipe, 9-fixing support, 10-pressure gauge, 11-on-off valve, 12-grouting pump, 13-second storage tank, 14-high pressure plugging pump, 15-first storage tank, 16-settling tank, 17-underground water level, 18-lifting assembly, 19-tunnel, 31-first connecting pipe, 41-second connecting pipe, 3-1-steel flower pipe. DETAILED DESCRIPTION

[0027] The technical solutions of the present application are further described below, but the scope of protection is not limited to the description.

[0028] Embodiment:

[0029] As shown in Figure 1 , 2 , a deep buried tunnel borehole water inrush high pressure plugging structure, comprising a water stopping assembly, a water guide assembly, a grouting assembly, a plugging assembly and a lifting assembly 18, the borehole 1 is communicated with the tunnel 19, the water stopping assembly is arranged in the borehole 1, the water guide assembly, the grouting assembly and the plugging assembly are arranged in the tunnel 19 and connected with the water stopping assembly, and the lifting assembly 18 is arranged in the tunnel 19.

[0030] The water stop assembly comprises a water stop plug 5 and a water stop cotton 6, the water stop cotton 6 is arranged at the port of the drill hole 1 communicating with the tunnel 19, the water stop plug 5 is connected to one side of the water stop cotton 6 inside the drill hole 1, a sedimentation tank 16 is arranged at the bottom of the tunnel 19, and a fixed support 9 is arranged on the tunnel 19, used for fixing a grouting pipe 8, a first connecting pipe 31 and a second connecting pipe 41. The water stop plug 5 can be made of rubber material. The sedimentation tank 16 is used for storing water discharged from the water guide pipe 4, and the discharged water can be used again after sedimentation.

[0031] The plugging assembly comprises a plugging pipe 2, a grouting pipe 8 and a first storage tank 15, the plugging pipe 2 penetrates the water stop assembly and extends into the drill hole 1, the plugging pipe 2 is connected with the first storage tank 15 through the grouting pipe 8, and the first storage tank 15 is arranged in the tunnel 19. The plugging pipe 2 is made of a steel flower pipe 3-1, a plurality of through holes are arranged on the steel flower pipe 3-1, the diameter of the through holes is not less than 1 cm, and the distance between the through holes is not greater than 10 cm, so that the water-fast material can be conveniently output, and the grouting pipe 8 is made of a rubber hose. The first storage tank 15 is used for storing the water-fast material.

[0032] The grouting pipe 8 is provided with a switch valve 11 and a high-pressure plugging pump 14, and the plugging pipe 2 is connected with the grouting pipe 8 through a buckle with a wire joint 7.

[0033] The grouting assembly comprises a grouting pipe 3, a first connecting pipe 31, a grouting pump 12 and a second storage tank 13, the grouting pipe 3 penetrates the water stop assembly and extends into the drill hole 1, the grouting pipe 3 is connected with the grouting pump 12 through the first connecting pipe 31, and the grouting pump 12 is connected with the second storage tank 13. The second storage tank 13 is used for storing cement mortar.

[0034] The grouting pipe 3 is connected with the grouting pump 12 through the buckle with the wire joint 7, and the grouting pump 12 is connected with the second storage tank 13, and a switch valve 11 is arranged on the connecting pipeline of the grouting pump 12 and the second storage tank 13.

[0035] The water guide assembly comprises a water guide pipe 4 and a second connecting pipe 41, the water guide pipe 4 is connected with the second connecting pipe 41 through the buckle with the wire joint 7, the water guide pipe 4 penetrates the water stop assembly and extends into the drill hole 1, the second connecting pipe 41 is provided with a pressure gauge 10 and a switch valve 11, and one end of the second connecting pipe 41 is located above the sedimentation tank 16. The water guide pipe 4 is made of a PVC pipe or a steel pipe, and the second connecting pipe 41 is made of a rubber hose.

[0036] A construction method of a deep-buried tunnel drill hole water gushing high-pressure plugging structure, comprising the following steps:

[0037] S1: The drill hole 1 is pretreated, and the construction personnel is lifted to the drill hole 1 through the lifting assembly 18;

[0038] S2: install the water stop plug 5 in the drill hole 1, and set the water guide pipe 4, the grouting pipe 3 and the sealing pipe 2 on the water stop plug 5 respectively, and set the water stop cotton 6 at the outer end of the water stop plug 5;

[0039] S3: the high pressure water gushing in the drill hole 1 is first drained through the water guide pipe 4 to the sedimentation tank 16, after the grouting pipe 3, the sealing pipe 2 and the water stop cotton 6 are installed, the switch valve 11 on the second connecting pipe 41 is closed to stop the water guide and drainage;

[0040] S4: start the high pressure sealing pump 14 to inject the water-quick-setting material into the drill hole 1 to seal;

[0041] S5: inject the cement mortar into the drill hole 1 through the grouting pipe 3 to consolidate and grout the drill hole 1;

[0042] S6: when the reading of the pressure gauge 10 is reduced to 0, the sealing of the tunnel drill hole water seepage is completed.

[0043] The water-quick-setting material is water-quick-setting water broken glass, which plays a role of rapid sealing, and the highest position of the sealing pipe 2 in the drill hole 1 is higher than the underground water level line 17 and close to the upper port of the drill hole 1.

[0044] The step of pretreating the drill hole 1 is that before setting the water stop plug 5, the sealing pipe 2, the grouting pipe 3 and the water guide pipe 4, the steel flower pipe 3-1 is set in the drill hole 1 to support, a plurality of through holes are set on the steel flower pipe 3-1, the diameter of the through holes is not less than 1 cm, and the distance between the through holes is not greater than 10 cm. After setting the water stop plug 5, the steel flower pipe 3-1 is replaced by a steel pipe without holes in the side wall.

Claims

1. A construction method for a high-pressure sealing structure for borehole water inrush in a deep-buried tunnel, characterized in that: The sealing structure comprises a water-stopping component, a water-guiding component, a grouting component, a sealing component and a lifting component (18), the drill hole (1) is communicated with the tunnel (19), the water-stopping component is arranged in the drill hole (1), the water-guiding component, the grouting component and the sealing component are arranged in the tunnel (19) and connected with the water-stopping component, and the lifting component (18) is arranged in the tunnel (19); The water-stopping component comprises a water-stopping plug (5) and a water-stopping cotton (6), the water-stopping cotton (6) is arranged at a port of the drill hole (1) communicated with the tunnel (19), the water-stopping plug (5) is connected with the water-stopping cotton (6) on one side of the drill hole (1), a sedimentation tank (16) is arranged at the bottom of the tunnel (19), and a fixed support (9) is arranged on the tunnel (19). The grouting component comprises a grouting pipe (3), a first connecting pipe (31), a grouting pump (12) and a second storage tank (13), the grouting pipe (3) penetrates through the water-stopping component and extends into the drill hole (1), the grouting pipe (3) is connected with the grouting pump (12) through the first connecting pipe (31), and the grouting pump (12) is connected with the second storage tank (13). The water-guiding component comprises a water-guiding pipe (4) and a second connecting pipe (41), the water-guiding pipe (4) is connected with the second connecting pipe (41) through a buckle belt wire joint (7), the water-guiding pipe (4) penetrates through the water-stopping component and extends into the drill hole (1), and a pressure gauge (10) and an on-off valve (11) are arranged on the second connecting pipe (41). The construction method comprises the following steps: S1: The drill hole (1) is pretreated, and a construction worker is lifted to the drill hole (1) through the lifting component (18); S2: The water-stopping plug (5) is installed in the drill hole (1), and the water-guiding pipe (4), the grouting pipe (3) and the sealing pipe (2) are arranged on the water-stopping plug (5), and the water-stopping cotton (6) is arranged at the outer end of the water-stopping plug (5); S3: High-pressure gushing water in the drill hole (1) is first guided and drained to the sedimentation tank (16) through the water-guiding pipe (4), after the grouting pipe (3), the sealing pipe (2) and the water-stopping cotton (6) are installed, the on-off valve (11) on the second connecting pipe (41) is closed, and the water-guiding and water-draining are stopped; S4: The high-pressure sealing pump (14) is started, and water-fast setting material is injected into the drill hole (1) to seal; S5: The drill hole (1) is consolidated and grouted by injecting cement mortar through the grouting pipe (3); S6: When the reading of the pressure gauge (10) is reduced to 0, the sealing of the tunnel drill hole seepage is completed.

2. The construction method of a high-pressure plugging structure for a deep-buried tunnel drilling water gushing according to claim 1, characterized in that: The sealing component comprises a sealing pipe (2), a grouting pipe (8) and a first storage tank (15), the sealing pipe (2) penetrates through the water-stopping component and extends into the drill hole (1), and the sealing pipe (2) is connected with the first storage tank (15) through the grouting pipe (8).

3. The construction method of a high-pressure plugging structure for a deep-buried tunnel drilling water gushing according to claim 2, characterized in that: The on-off valve (11) and the high-pressure sealing pump (14) are arranged on the grouting pipe (8), and the sealing pipe (2) is connected with the grouting pipe (8) through the buckle belt wire joint (7).

4. The construction method of a high-pressure plugging structure for a deep-buried tunnel drilling water gushing according to claim 1, characterized in that: The grouting pipe (3) is connected with the grouting pump (12) through the buckle belt wire joint (7), and the grouting pump (12) is connected with the second storage tank (13), and the on-off valve (11) is arranged on the connecting pipeline of the grouting pump (12) and the second storage tank (13).

5. The construction method of a high-pressure plugging structure for a deep-buried tunnel drilling water gushing according to claim 1, characterized in that: The water quick-setting material is a quick-setting water broken glass, and the highest part of the plugging pipe (2) in the borehole (1) is higher than the underground water level line (17).

Images